Analysis

  • max time kernel
    134s
  • max time network
    298s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-06-2024 01:39

General

  • Target

    cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe

  • Size

    2.4MB

  • MD5

    fa3b69af927ad405668e5b2d569d7e66

  • SHA1

    9a9a881571dc2e8fcb0e20608e5c92d209d02ce2

  • SHA256

    cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8

  • SHA512

    9d56aa149dd437d2dff73272f7d0f32ef2cf877723774e551d38f24abea0fabf5ba41d0d009928fc49102928a0694e9bab4ef2240d71311ffc87f9bb2248ffe7

  • SSDEEP

    49152:wQc81KnB/a/hNT/dRYa8aesY3Ot4N7G/:wDta/hNT/dRn0etD/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

  • Detect Vidar Stealer 8 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe
    "C:\Users\Admin\AppData\Local\Temp\cb9eb4cf9f04ef0d5c3c2c3dd8d0154dbd0d4d3073359be6ca9e723fe4c31fa8.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:420
    • C:\Users\Admin\AppData\Local\Temp\kat6448.tmp
      C:\Users\Admin\AppData\Local\Temp\kat6448.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:2992

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat6448.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/420-0-0x00000000008F0000-0x00000000008F1000-memory.dmp

    Filesize

    4KB

  • memory/420-1-0x0000000003F60000-0x00000000040AC000-memory.dmp

    Filesize

    1.3MB

  • memory/420-10-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/2992-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2992-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2992-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2992-25-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2992-26-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2992-28-0x000000001DB70000-0x000000001DDCF000-memory.dmp

    Filesize

    2.4MB

  • memory/2992-43-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2992-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB